For the next 3 days, minor G1-class geomagnetic storms are likely, according to NOAA forecasters. The action could begin later today, July 21st, when a slow-moving CME is expected to hit Earth’s magnetic field; it was hurled into space by a solar eruption on July 15th. Forecasters believe a high-speed stream of solar wind is following close behind the CME. Its arrival on July 22nd could amplify any storm the CME creates, prolonging the unrest through July 23rd.
https://spaceweather.com/
Mike Terry to WOR iog (2022-07-21)